Swivel nose screw



April 9, 1946.

C. E. WYRICK swIvEL NosE'scREw Filed Aug. 5, 1944 INVENTOR TT%RNEY vPatented Apr. 9, 1946 UNITED, STATES PATENT OFFICE ,SWIVEL NOISE SCREWClayton E. Wyrick, Miami, yFla.` Application August 5, 1944, Serial No.548,231

` A (Cl. 85%1) 5, Claims.`

This invention relates to` set screws or retaining screws that areadapted to extend through pulleys and the like to prevent rotation ofthe pulley upon a shaft or axial movement thereof with respect to ashaft. It is, of course, understood that this is merely one illustrationofa place' where a set screwor a retaining screw of this invention canretaining and set screws.' e

,Y An object of the invention is to provide a set screw ora retainingscrew of an improved type be used, there bemg hundreds of other uses forthat is constructed and` arranged in a manner thatr a single length basescrew can beused for setting into a tapped hole and the screw will haveanose offany' length extending therefrom that will pass throughtheremaining length of the tapped lhole` or untapped holeto engage ashaft or other mechanismthat extends through the member'with which theset screw or retaining screw is 'as sociated.

One of the chief disadvantages of the set screws on the 'present daymarket 'is the fact that each and 'every'screw must be manufactured `to`a predetermined dimension in length so that lit can sit in a specialspace, or else the design of the mech-` anisrn with which the set screwis to be associatedmustbe designed in. a manner that 'it will"accmmodatestandard set screws. However, wherever a' special'set screw isneeded it in ust be of a special length and the hole to receive the setscrew must be tapped throughout the entire length of the hole inorder topermit the set screw to ride` upon the device it is to secure 'inposition. Such arrangements therefore 'require a very high inventory inspecial sized set screws that are required to fill special needs.

Also, a major number o f suchescrews on the market todayare adapted to,engage the 'mechanism that is to beretained in position by fric-Vtional contactby means of the actual body of the set screw itself "sothat when such screws are rotated in a'hole intol which they arethreaded the end of such screw will engage the mechanism to be securedand will dig into the mechanism.

Actually, for this purpose the ends of theset screws are hardened sothat they will not lbe deformed when they are `,forced into engagementwith the mechanismjto be secured, but rather the mechanism to be securedwill be deformed by means of the set screw in order to insure good tightengagement therewith. In many instances, whereinshaftsare'jtobeiattached to various devicesfandconstant adjustment ofI theshaft is requiredin order to locate ',jthewdevice thereof, suchtype.of's'et screws asare4 available today,

mark the shaft tosuch an extent that after the set screw has been.placed on the shaft a number of times it is impossible to relocatelanydevice on the shaft with any particular degree of accuracy;

Y Also, all of the set screwsthat are in use today on the present marketrequire that the tapped hole to receive the same shall be tapped theentire depth of the hole so that the end of the set screw can be locatedin the bottom of the hole or a long threaded set screw will be threaded`into the tapped hole so that the top of the set screw will be iiushwith the top of the device that it is associated with to permitengagement therewithwith a conventional screw driver or!Allen" wrench. YY i The set Vscrew or retaining screw of this invention vhas beenconstructed and arranged in a manner that a standard base screw can bemanufactured, and a .nose ofany length can be attached to the standardbase screw.

Regardless of the depth of the .iluminan is tobe traversed by the setscrew, it is only` necessary that a nose of a predeterminedlength shallbe 2K5 attached to a standard basescrew member.

needonly'be tapped a relatively shortvdistanceA of its entire lengththereby reducing the costof producing tapped holes and eliminating manybroken taps in the manufacture of tapped holes that are of extremelength. i e A It is another object of the invention to provide a setscrew or a retaining screw that may be manufactured in a more or less nstandard manufacturing process to standard dimensions that can besubsequently used in any hole of any length merely by attaching a nosemember to the standardbase screw that is suciently long to extendthroughV the hole with which the set screw is to be associated.

It is another object of the invention to'provide a set screw or aretaining screw that is constructed and arranged Vin a manner that thenose of the set screw shall pass through a hole that vhas been"previously `drilled to a size sufficient to be tapped to receive thethreads of a threaded base member of the set screw.

Still another object of the invention is to provide a set screw having astandard base member that is threaded and is adapted to be associatedwith a nose member rotatably positioned upon the threaded base member sothat the nose member when in engagement with the device to be securedwill not rotate or dig into the device and thus prevent marring of thedevice even though `the base of the set screw is rotated to applypressure upon the nose member and to force the 5 same into engagementwith the device to be retained.

In considering the various aspects and the novelty of this invention theapplicant is well aware of such setlscrewsaor retaining;screws` asff l0disclosed A`in ltheY1 patent'iv to Barnes -1,=581`;096, patrented April20, 1926. However the set screw of this type does not have theadvantages that have:A heretofore been set forth. In the rst-,plaeea setscrew of the type disclosed in this patent Yre 15` dition, each time aset screw of a different length 20 is -to befmanufactured;yaccordingtothe :disclosure ofthis patentee, it is lnecessarythatfheproduce.' a special nose' member having'a shanlof suicient length thatitextends" completelfthrough the set screw so that it can be retained intlreset'- 25* screwby peening over thetopofthe shank member ofthenosegWhenma'nufacturing'set screws'accordingft'o'thedisclosurebfithisipatentethere will-be `nod'ecr'ease-*inthe"inventoryrequired`for' conditions of'a special lengthtappedhol'ey into which thesetfscrew is tobe' placed:

Y On the# other hand; this 'applh'zz'int` l'i'as provided Y aconstruction of' afv set` screwora retain^ 3 ing screw wherein he canset up to manufacture thev hasefscrew' member' asa 'standardpro'ductionarticle inma'ny thousands; with absolutely no" change in the" basemember; Aften the base nose member of'any length tothebase member by astanda'trd|- procedurefso f that irrespective of the'depth offholewithw-hichthe set screw isito be associated-thereiis"ndchange-required"in the" the set screw; Tl'ius;v it is seen ti'iatv the applicants setscrew can meet many varying' condi-'e tions-'without altering thel basicmanufacturing procedure; whereby he is# able tof substantially" reducethe cost of v 'manufacture oifthesetiscrews' 50 and reduce theinventory-of those required'.i to" retain such'fscrews` on theirvshelves' in' stock.

The foregoing objectfslland;advant'ageswillbe# come more apparentfrom-the'fdrawingand the following description. 55

Figure 1 is a cross-sectional view' showing a pulley mountedonafL shaftillustrating thel use'4 of a shortinoseset screw for retaining thevpulley`4 on the'shaft. 60

Figure- 2` ist` a," cross-sectional view illustratingir the* use' of alpulley f on a Y shaft Vand showing the use of a long nose set'screwwith"the" same standard base theis'etscrew 'showninFigurezl for'holding-the-pulleylon'the shaft: e5

Figure vl3 is an* enlarged cross sectional' view taken throughthevertical section" of the screw shown in Figure 1 taken'- along1ne3lV-3 of Fig'- ure 1.

of.VY the Aset'screwshown iii-Figure 3"andis taken. v alouglineSL--B- ofFi'gure.' Y i Figure 6 is a vertical cross-sectional view similar toFigure 4 but showing the manner in which a nose member of the set screwis attached to the threaded base member.

Figure 7 is an elevational view of the set screw shown in Figure 4 butshowing the use of a screw driver slot in the head of the set screw inplace of the hexagon wrench socket illustrated inFigure 4, butillustrating that the base memberoftiiefsetscrew isthefsamefasstti'euiase member-bf theeset-screw showrrin Figureel* Figure8 is an elevational view illustrating the use of a hexagonal head on ascrew but showing thatthe` general principles on the manufacture of thescrew is the same as disclosed with regard to ariyfefztli'eiotherfigures in the drawing.

Figure 9 isa cross-sectional view of a modified structure of theset`screw showing the use of a modi'didriver slot therein,

The set screw or retainingscrew of thisinventioniconsists ofA aA basicjbbdy'memberjl Il'that has exterriai threads'V I'IJ extending"throughout the length of *the body "member" I Il.' This n basic: body'mainthe'same'regardless"oftwrietherthe set"screw" is to receivel'ahiexa'gorial'*socket;l a'screw'di'ivei" slot or any'othertype"ofmeansfori rotatingtlie" p `,.set' screw-base member.

set screws of speciarlength' becauseea'ch"l ani-R31)rl-` every onemust'-be; manufactured tov meet the" A recess I 2"is` providedwithirtiiebase'member Iothat 'isaxi'ai'ofithe basememberl The botadjacent" the bottom:waill 'l oftheba'se member l u' The distance between'whefwaii faces.l'fand Ill" can bemaintaiie'd`faa: predetermined" spaced this'process:so that`th'ere .will Y'be' alstandardization of the'procedure Linmaking;the setscrews as" n y wella's'the procedureinsubsequentl'assemblng, member is -manufactured he*v canthen' attach` a40" them upon nose bodies. By. 'standardiing the procedure in" thismanner.; v.it is possible to make the' base screwv member Ill" on" a'standard' production set up" and?- there willi be'A no changesL e.IIeedi-d" when set screws of" any special" lengthvv general' and* basiprocedure* of" manufacturing 45- are 'requiredf l As illustrated inFigures 3l'an'd'4aha'se screw member IIVis' providdwitlr. av` hexagonalsocketl A hole. I 6extends' through .the wall between the surfaces I3and/"14' that', is: axial .with the base memb'er IllV Here again inall.' of.' the setscrews.

to be manufacturedlthishole can .be the.. same diameter throughout. soa's to; standariz'e proof the threadil l orjust slightly smallerLthantheroot diameter; Sinceholesth'ataresusuallydrilledI to receive the threadI 'I Q tohe subsequentlyftappedl for. thesame, vare ofasiethatar'e.slightly'larger tharithe rootl diameter 'ofthe threads?! I,it.wil1 be apparent` thatif "ther nose. member.. I 8" is equal. totheroot diameter'. of the threads. II. or. just. slightlvsmallerthanthesame itwillpass .through any. hole .th'at-.-will.bedrilledltoreceivea `tap forl threading the hole. in a mannerto. receive.the

n Y itlireadsllll Figure 4 i'sa vertical'crosssectionalvview of" 70trusio'n. I9"that`.is-adaptdto.extendthrough'the. hole; I Iiprovidd iii.thebase setscrew I llwhere` the protruding member.. I'9 has aidiametenthat. is'..s1ightly,` smaller than. .the diameter offthelhol the nose I8 can rotate with'respect to the body I Il. The protruding portion I9kis provided `with :an inverted cone-shaped depression 20 therein in thetop surface of .the protrusion I9. i

To assemble the base member Ill upon the nose member I8, the protrudingportion I9 is extended through the hole I6 in the base member Illasillustrated in Figure 6. A staking tool 2| `isprovided that ispreferably atri-edged tool having the edges 22 thataredisposed onanangle of .an inverted cone that is substantially` shallower than theinverted cone-fshaped recess provided, inthe top` surface of theYprotrusion. I9.Y By striking a sharp hammer blow. upon `the'staking tool2 I,. the extreme upper edges ofthe protrusionv I9,vwhich are.relatively thin,. wil1. be pressed outwardly at three points bytheftooljZI, thesepoints being indicated by the numeral. 23 in- Figure5.` Itis not essential nor isitldesirable that these protruding lips 23shall `extend any great, distance beyond the diameterv ofthe protrudingmember I9 because it is only necessary that they extend alsuicientdistance to prevent the nosemembe'r I8 :from falling off of the ,basemember Ill-in case the set screw is to `beremoved. from a holev after ithas vonce been placed therein. i' In fact, the set screw can'beassembled in a hole by iirst placing thenose member I 8 within the holethat has been previously drilled to receive the same and the set screwbase. I can then be insertedy in the threaded portionof the 4-hole toforcey the nose member down against the member to be retained thereby.Subsequently the staking .tool 2I can be engaged upon the protrusion I9and a suitable hammer blow struck v.uponthe staking tool in order to`turn over the edges of the protrusion I9 in a manner as illustrated bythe numeral 23 on Figure 5. I If at any time it is desired to remove thebase member I0 from a'nose member I8 it Awill be a relatively easy jobtodo the same because `the protruding flange portion I9'wlll not havebeen forced outwardly `to any great extent by means of the staking tool,sothat it will be possible to pull the vnose member from the base memberby means .of` a little force. Another nose member can then be insertedonthe base member Il), and the set screw vbase member I0 canbe re-usedwith a new nose member `I8 ofthe same length orlof adiiferent length,and can be used in a diiferent hole.

If the hole that is to receive the set screw or retaining screwisrelatively deep as illustrated in Figure 4,. the hole 25 will be firstdrilled in conventional manner by means of a drill of a suitablediameter for receiving a tapthat is to thread the upperV portion of thehole to receive the threads II on the base member I0 of the set screw.The upper portion of the hole 25 will thus be threaded by asuitable tapto form a thread 2E. The thread 26 need be formed in the hole 25 only toa suilicient depthasitozreceivethe base member I0. The remaining`orlimajor portion of the hole 25 may remain untapped whereby the periodof time for the tapping operation is considerably reduced and the dangerof breaking the tap in making the long'hole has been eliminated. Y iTheuse ofV the set screw will become apparent. It is only. necessary toinsert the lsame into the hole with the nose I8 vextending" through theuntappedvportion of the hole-2l5and thread the base' member In into thethread 26. Asfpreviously'me'ntioned; the protrusion I l9 on themnosefl8is a loosefltin the hole I6 so that thefnose'rl will stay stationary'with respect fto fthe rotating base memberl, afterfthenose I8hasengaged the shaft Vso that continued rotation of the basel will notforce rotation of the nose I8 and thus -mar the surface of the shaft 30.The basermember I0 is thus freely rotatable with respectto the nosemember I8. i

As previously mentioned the specication one of the major purposes of theinvention is to reduce the inventory ofspecial set screws havingspeciallength and to standardize on the procedure of manufacture of thebase member of the set screw.- Bycomparing the set screw illustrated inFigure 3 and that illustrated in Figure 4, it will become apparent thatthe base member yI 0 of the' set screw shown in Figure 3 is identicalwith the base member II) ofthe set screw shown in Figure 4. However, thenose member 3I attached to the base member I0 of the set screw shown in-Figure 3 is substantially shorter than the nosernemberl attached to thebase screw I0 shown in Figure 4. At this point it will again be notedthatV the protrusion I9a of the nose member 3I is of the same length asthe protrusion I9 on the set screw heretofore described so thatthe shortnose member 3| can be inserted upon the standard base screw I0 and thelip of the protrusion I9 can be staked over in conventional manner asheretofore described in order to hold the short nosemember 3I on thestandard screw base member I0. `From the foregoing it will beVapparent'thai'.pwith the standard base member i0 of the set-screwillustrated in Figure 3 being the 'same base member I0 as that of theset screw `1,.1 l15trated inFigure 4 a'threaded hole 32 inthe ypulley 33will be of the same tapped depth as the hole-26 ythat `has beenillustrated inthe pulley34. g' 1 f i A f Here again zstan"dardiizationhas been` achieved and only short4 taps are "required to'thread the holeto receive the various set screws regardless of the length of the setscrews that are to be inserted intothe hole. Y

` 'I further illustrate the standardization procedure that has beendeveloped by this invention, there-is shown in Figure 7- a set screwbase Illa that is provided with a screw driver slot 35 for rotating thescrew Illa. It will be noted that the centralhole I2a is the samediameter and depth hole that has been previously referred to with regardto the hole I2 shown in Figure 4. Also,` the" nose member 36 that isattached to thescrew baseIIJar is secured thereto in identically thesame manner as heretofore described with regard to the set screwsdisclosed and described with regard to Figures 3 and 4. Actually, theonly change in the` procedure that has occurred in manufacturing thebase screw member Illa is that the screw driver slot has replaced thehexagonalfsocket head I5 illustrated in the set screws shownvFigures3"and"4.`v Therefore, in al1 respects, the set screw body I0a can beused in the same tapped hole that would be made for the screw -body I0,and in fact canbe used in the identical tapped 'holes 26 and 32illustrated in connection with the drawing shown in Figures 4 and 3respectively.V The nose 36 on the screw base Illa can be of any lengthfor dropping into any hole of special length that may be required.

Inc that has a modified driver slot in the head thereof that preventsspreading of the screw head when forcel is applied on the driver. TheS'et screw base I 0c has a semi-circular slot 50 milled or cutin the topsurfacethereof.` .The

In Figure 9 there is illustrated a set screw base Y The driver for usewith the screw baselllc has a atshank 52 adapted to fit into the slot 50`and is provided with a semi-circular nose to fit the contour of theslot 56. A pilot 53 can be provided to extend from the nose ofthe driverto be positioned in the central hole l2c andthereby prevent accidentalmovementof the driver out ofthe slot when force is applied to thedriver.

In Figure 8 is shown a further modification of the basic construction ofthe set screw of this invention wherein the screw base lub isstandardized in all respects with the exception of the hexagonal head 3lthat has been added to the screw base lllb. However, the central @holel2b is drilled through the base ,memberl lllb to the same point adjacentthe bottom wall of the screw member Hlb in the same manner `asheretofore described with regard to the recess or holevlZ shown inFigure 4. Therefore, the nose member 38 that is attached to the basemember lub can be lconstructed and arranged in identically the samemanner with regard to the nose members heretofore described, and .canbeattached tothe base member lb in identically the same manner asheretofore described with regard to the nose members I8, 3l and 36.

From the foregoing description it is believed it will be apparent thatthe particular construction of the set screw or yretaining kscrewof thisinvention has definite advantagesover any of those known to the priorart because, they donot disclose the standardization of'screw sizes thatcan be Vused in any depth tapped hole desired regardless of the lengthof the hole and regardless of the distance that the member to be securedwill be positioned from` the portion of the hole that is tapped. Itis'necessary only to provide a nose member of the desired length toextend from the f base member of the set screw into Aengagement'. withthe member to be secured. These nose members can be of any lengthdesired and can be made from any common cylindrical stock that can befound in any shop. Y

While the apparatus disclosed and described herein Vconstitutes apreferred form of the invention, yet it is to be understood thatmechanical alterations can be made to the device that fall within thepurview of the invention, and that such modifications as fall within thescope ofthe appended claims are intended to be included herein. g 1

Having thus fully described my invention,- what I claim as new anddesire tosecure by .Letters Patent, is: .f

' l. A retaining screw comprising, abody member, external threads onsaid bodymember, a recess in said body member having thebottom wallV ina cylinder defined by therroot diameter ci said threads, a protrusionextending axially fromione.

.endof said nose. memberlzandextending through said l'iolein said ,wallsection loi said body member and freely .rotatable thereimto permitfreedom of rotationof said'rxose'member .relative to said body member,said'protrusion having outwardly thrust portions thereon that resistremoval of said nose member .from said .body

member.v Y. ..1

2. A retainingscrew comprising, a body memner, external .threads-on saidbody member, a recessrinsaid body memberhavingthe bottom wallthereofclosely.adjacent thebottom surface of said body member whereby toprovide a relatively narrow wall section therebetween," an axial; holethrough said'wall `section having :a Adiameter substantially ,less thanthe diameter 'of said recess, a nose member .shaped in :such a manner asto have the side wall thereof .disposed within a cylinder defined by therootdiameter of said threads, an'axial protrusion on one end of saidnose member extending through said hole and having a diameter smallerthan said hole whereby to permit free vrotation ofv saidzbody memberrelatively to said -nose member with said protrusion, said protrusionhaving the top surface thereof extending a relatively short distanceaboveY the bottom surface of said recess and contained within therecess, and outwardly pressedfportions on the upper edge of.saidprotrusion whereby to resist removal of. said protrusion through saidhole.

3. A retaining screwv comprising, la body member, external threads onsaid body member, a recess in saidvbody member. havingl thesbottom wallthereof closely adjacent Lthe bottom .surface of said lbody member.whereby to provide a relatively narrow wall section therebetween, anaxial hole through said wall section Vhaving a diameter substantiallyless than the diameter of said recess, a nose member having a transversecross sectional'dimension not greater than the root diameter ofsaidthreads, an-axial protrusion on one end of 'saidnosefmemberextendingthrough said hole-and having a diameter 'smallerthan said hole whereby'to permit free .rotation of said body memberrelatively` to said nose .member with said protrusion,.said protrusionhaving the top surface thereof extending` -a relatively -shortdistanceabove the bottom surface of fsaid recess and containedwithin the recess,and .outwardly pressed portions on the upper edge 1.of said protrusionwhereby to resist removal of said protrusion through said hole, saidoutwardly formed edges on said protrusion being spaced from the bottomwall of said recess whereby to permit free axial f movement of said bodymember relatively to said nose member.

LA retaining screw comprising, a body member, external threads non saidbody member, a recess in said body member havingY the bottom wallthereof `closely adjacent thef bottom surface of said body member.whereby tof-.provide a relatively narrow wall:sectiontherebetween, anaxial hole through said' wallse'ction; having a diameter substantiallyless than 'thediameter of said recess, a nose member shaped in such amanner as to have the side wall thereof disposed within a cylinderdefined by the root diameter of said threads, an axial protrusion on oneend of said nosemember extendingr through Vsaid hole and having adiameter smaller than said hole whereby to permit freerotation of said`bodymember relatively to saidnose membeisaid .protrusionhavingthewhereby to provide relatively thin edge portions on the extending edgeof said protrusion, a plurality of outwardly formed portions on saidthin edge portion of said protrusion whereby to resist removal of saidnose from said body but whichV tion therebetween, an axial hole ofstandardized diameter through said Wall section, and a nose memberhaving a transverse cross sectional dimension not greater than the rootdiameter of the threads of said body member having an axial protrusionextending from one end thereof, said protrusion having a diameter lessthan the diameter of said hole and a standardized length notsubstantially greater than the thickness of said Wall section, said nosemember being adapted to be of any length desired whereby to produce aretaining screw that can be inserted into a hole partially threaded toreceive said body member with the nose member extending through theunthreaded portion of the hole.

CLAYTON E. WYRICK.

